Countries' experiences scaling up national breastfeeding, protection, promotion and support programmes: Comparative case studies analysis

Abstract Scaling up effective interventions, policies and programmes can improve breastfeeding (BF) outcomes. Furthermore, considerable interest exists in learning from relatively recent successful efforts that can inform further scaling up, with appropriate adaptations, across countries. The purpose of this four‐country case studies analysis was to examine why and how improvements in BF practices occurred across four contrasting countries; Burkina Faso, the Philippines, Mexico and the United States of America. Literature reviews and key informant interviews were conducted to document BF trends over time, in addition to why and how BF protection, promotion and support policies and programmes were implemented at a national level. A qualitative thematic analysis was conducted. The ‘Breastfeeding Gear Model’ and RE‐AIM (Reach; Effectiveness; Adoption; Implementation; and Maintenance) frameworks were used to understand and map the factors facilitating or hindering the scale up of the national programmes and corresponding improvements in BF practices. Each of the studied countries had different processes and timing to implement and scale up programmes to promote, protect and support breastfeeding. However, in all four countries, evidence‐based advocacy, multisectoral political will, financing, research and evaluation, and coordination were key to fostering an enabling environment for BF. Furthermore, in all countries, lack of adequate maternity protection and the aggressive marketing of the breast‐milk substitutes industry remains a strong source of negative feedback loops that are undermining investments in BF programmes. Country‐specific best practices included innovative legislative measures (Philippines), monitoring and evaluation systems (United States of America), engagement of civil society (Mexico) and behavior change communication BF promotion (Burkina Faso) initiatives. There is an urgent need to improve maternity protection and to strongly enforce the WHO Code of Marketing of Breast‐Milk Substitutes.

Unfortunately, only 48.6% of infants younger than 6 months are exclusively breastfed in low-and middle-income countries .
There is evidence that optimal BF behaviors, including exclusive BF (EBF), can rapidly improve when countries implement effective programmes (Pérez-Escamilla et al., 2012). The scaling up of BF programmes could prevent an estimated 823,000 child deaths and 20,000 breast cancer deaths every year . Also, it could reduce morbidity (Sankar et al., 2015;Victora et al., 2016) and improve children's educational potential and, probably, their income as adults (Victora et al., 2015).  . However, despite this increase, most countries are still far from reaching the 2025 EBF target of World Health Assembly Resolution 65.6, which aims to increase the rate of EBF in the first 6 months up to at least 50% (WHO, 2012). Therefore, there is an urgent need to better understand how successful scaling up efforts in countries has happened, in spite of having contrasting political, economic, social, cultural and health care systems contexts.
Comparative case studies that are systematically conducted and analyzed are needed to generate this crucial evidence for informing the successful global dissemination, scale up, and maintenanc of effective national BF programmes. The objective of these case studies was to identify key facilitators and barriers for BF scale up at the national level across four countries with contrasting contexts, but where the rate of EBF improvement has been substantial during the past decade.

| Key Informants interviews
We selected the key informants (KIs) based on their extensive knowledge of the BF environment in each country. We conducted indepth semistructured interviews remotely (Appendix S1) with individuals representing several sectors (society, academia, government authorities and international organizations) working on the protection, promotion and support of BF in each of the countries. The interview guide was developed similarly to previous case studies implemented by our team for the 2017 Lancet Early Childhood Development Series (Richter et al., 2017). Before the interview, a consent form (Appendix S2) was emailed to all interviewees for their written approval. The interviews were conducted through the Zoom platform by two authors (V. L.-M. and S. H.-C.), during the months of June to August 2021.
Authorization to the interview was requested. The study was approved by the International Review Board of Universidad Iberoamericana in Mexico City.

| Qualitative thematic analysis
The case studies were analyzed using thematic analysis and as stated before, mapped to two frameworks, the BFGM and RE-AIM. The BFGM is a Health Care Complex Adaptive Systems framework that has been successfully tested in eight countries across five world regions to identify or strengthen policies needed to enable the BF environments (Pérez-Escamilla et al., 2012). We used the RE-AIM implementation framework to identify the drivers for improvements in BF practices in each country. The RE-AIM framework has been successfully used by our team in other recent case studies analyses of evidence-based obesity policies and programmes . The BFGM allowed for these findings to be integrated into a pragmatic dynamic systems model. 3 | RESULTS

| Literature review
The academic literature searches provided an initial sample of 62 unique articles published in peer-reviewed journals. The titles and abstracts were screened for inclusion leading to 29 articles that were fully reviewed to determine eligibility, and 25 were included for data extraction (Figure 1). The main reasons for exclusion were lack of information on policies, programmes, or interventions to promote BF and unavailability of the full text. Regarding the grey literature, four documents and official web pages from international organizations were found. A total of 12 articles were not detected through electronic searches but were identified and shared by KIs. Therefore, we retained a total of 41 sources of information for final data extraction.

| Key Informants interviews
In all countries, high-level KIs were identified in the organizations or institutions selected a priori for this study. The detailed descriptive characteristics of the KIs' are included in Appendix S4. A total of 18 KIs were interviewed, with Government being the most represented sector (Table 2). The majority of the KIs were women (14 out of 18), with an average age of 48.6 years, and 4.7 years in their current employment. Interviews lasted 45 min, on average.

| Four-country case studies
The four-country case studies are summarized below, highlighting similarities and differences between countries. The detailed findings of the study (Boxes 1-4 and corresponding Supporting Information Materials) and illustrative quotes from the KIs (Table 3) Technical and Financial Partners), created in 2012, has been a key channel for close coordination between the DN and PTF, which has allowed nutrition to become a priority in the country, helping to mobilize funding and define policy objectives.
In Burkina Faso, an initiative called 'Stronger with Breastmilk Only' (SBWO, 2021) and a program called GASPA (Groupes d'Apprentissage et de Suivi des Pratiques optimales d'Alimentation, for its acronym in French) has been key to foster an enabling environment for BF. SWBO is an initiative that includes an awareness campaign that promotes giving babies breast milk only, ondemand and stopping the practice of giving water and other liquids and foods, from birth until the first 6 months of life. GASPA facilitates support groups for mothers and the target beneficiaries for this program are pregnant women, mothers with infants 0-6 months and mothers with infants 6-24 months. From the KIs' perspective, the above-mentioned initiatives were probably successful as a result of a combination of several factors, such as the evidence collected earlier (formative research) and the identification of adaptations needed during implementation. The case of Burkina Faso highlights the importance of community mobilization across RE-AIM (reach: number of people impacted, effectiveness: addresses the impact, adoption: prescription in the policy process, implementation: fidelity, adaptation and costs; and maintenance: addresses the extent to which it becomes part of the organization's standard practices) dimensions: reach, effectiveness and adoption, implementation and maintenance (Appendix S5 Over the last decade, infant and child feeding practices became a strong priority for the government (political will), which appears to be reflected in the support that the SWBO initiative has received from the previous and current Minister of Health who publicly expressed their commitment. Following the nutritional crisis in some countries of the Sahel region (Burkina Faso, Niger and Mali), many International NGOs came to provide support, and, as a result, nutrition activities were strengthened to prevent malnutrition. Prior to 2007, there was no specific nutrition directorate, so all the nutrition activities were under the Family Health Directorate. International Organizations' advocacy was essential for consolidating the creation of the DN, housed in the Ministry of Health, which currently coordinates all activities related to infant health and nutrition, including BF.
'…So, following that crisis, that nutrition crisis that occurred in 2005 and there was a shift, there were and a big change in the country because the nutrition activities were strengthened and the government had decided to put big importance in nutrition, international NGOs has come in the country and a lot of advocacy had started because at that moment there was not a direct specific directorate for nutrition… So, in 2007, the following, the advocacy and the fact that nutrition was being strengthened and consolidated in the country, there was a creation of the Nutrition Directorate…' (International Organization, Burkina Faso, [03B]).
The work of the DN appeared to be a catalyst for the implementation of different endeavors to support BF, such as the revision of maternity legislation, the development of mass communication strategies for behavioral change and the enactment of policies in favor of BF. The Burkina Faso government developed a National Infant and Young Child Feeding Scale Up Plan (2012)(2013)(2014)(2015)(2016)(2017)(2018)(2019)(2020)(2021)(2022)(2023)(2024)(2025), with the partnership of Alive and Thrive (A&T), UNICEF, among other international agencies and NGOs (Scaling Up Nutrition, 2021). This is a multilevel strategic plan aimed at improving infant and young child feeding practices across sectors and at all levels, from the health system to the community, to standardize health and nutrition messages (Program delivery/Coordination). It includes training of traditional leaders, midwives and the creation of mother-to-mother support groups, through the GASPA described above.
(Continues) HERNÁNDEZ-CORDERO ET AL. '…The other point is that the country has tried to work at different levels, of community labor, health system, and to do mass advocacy.
To have only one message at all levels of implementation. And this has been really a success, a success story, I can say, for example, the government or the Ministry of Health will work with journalists, with the midwives, with them, with the NGOs, with health workers they are implementing at all 13 regions. They are not working only at the central level, but in the 13 regions to make sure that there is the same information that is going on all over the country, including the traditional leaders. So this last year, the last five years, the country had really focused on traditional leaders because they have a very, how to say, a very a big commodity. I don't know how to say the word influence. I can say every influence of the population…' (International Organization, Burkina Faso [01B]).
Coordination also appears to be carried out effectively by different actors at several levels. In the case of the SWBO initiative, in 2020, a tripartite alliance composed of the DN, A&T and UNICEF, organized a national launch of the SWBO-related campaign and subsequently supported subnational launches in the various regions. It helped to achieve combining different program components at both the community and health services levels to raise awareness of the importance of EBF (SBWO, 2021). Considering the SWBO campaign-a mass communication to foster behaviour change-the SWBO initiative also appears to involve the BFGM 'promotion' gear. It is worth mentioning that the support of international organizations has been key to sustainability through the financing of multiple actions.
'…local NGOs, most of them, they are doing promotion at the community level and that they are supporting the implementation of GASPA, this woman supports group and the work we funded community health workers. And again, that was the worry, the concern we have about the community works because it relates to much on external funding deals locally NGOs and its funding from donors…' (International Organization, Burkina Faso [02B]).
Burkina Faso has made substantial efforts to improve its EBF rate. However, some challenges or negative feedback loops have been identified. Although BF is a priority for the government, it currently lacks a specific government budget for BF, representing a risk to the sustainability of currently implemented actions to promote, protect and support BF. With respect to the Code, in spite of the current revision of the legislation, it has not yet fully incorporated all provisions related to it, and there is still contact between the BMS industry with health professionals for event sponsorship. Likewise, with regard to maternity leave, it is still not aligned with the International Labour Organization (ILO) Recommendation No. 191 (ILO, 2000), which encourages member countries to extend maternity leave to at least 18 weeks.
'There is the problem of financing, and this problem has an impact on the coverage of the community activities. But there is also another kind of problem to change the way of working. If every health district implements the community activities with the mother-to-mother support groups without waiting for a partner who is going to come and implement it with additional resources, this can help to scale up activities at the community without a lot of additional money…' (International Organization, Burkina Faso [03B]).
'… most of the health professionals are promoting breastfeeding. There is a small group that is still, how to say, that it's still corrupted. I can use this word? I don´t know, by Nestlé, and that is still advising the utilization of breastmilk substitutes because Nestlé or and I don't know, another company, the most, the one that is working in the country is mainly Nestlé is, they are paying they're still paying some scholarships for pediatrician, or they are still paying some workshops organized by pediatricians. And so, they still have an influence on pediatricians, on the group of pediatricians. We are trying, UNICEF and the government […] to continue to advocate so that small groups continue to promote breastfeeding. I can say that, compared to the other countries where I had worked, in Burkina, is not the worst because most of them I can say 90 percent of pediatricians are promoting breastfeeding and the group that still had to change is not so big, but still the work has to continue' (International Organization, Burkina Faso [01B]).
'There is still a problem with the maternity leave, the maternity leave after the delivery, which is still at 14 weeks. So, there is still a place where there is still advocacy on that. OK, so the legislation part was, is trying to be more. The other factor of success in Burkina is that there are partners, very dedicated, for breastfeeding. Those partners are, for example, UNICEF Alive and Thrive, IBFAN' (International Organization, Burkina Faso [01B]).

BOX 2 Mexico case study
Mexico is an upper-middle-income country, in Latin America and the Caribbean region, with a population of 127,792,000 people in 2020 (OECD, 2021). Mexico has been doubling its exclusive breastfeeding (EBF) rate, from 14.5% in 2012 to 28.6% by 2018 (González-Castell et al., 2020; World Health Organization (WHO), 2020b).
Between 2006 and 2018 the government invested in national policies and programmes to promote, protect and support BF; those identified through the literature review and mentioned by key informants were included in this analysis (Appendix S5). Although the current administration that came into power in 2018 has not continued with these efforts, Mexico was included because it has strong documentation of EBF improvements and implementation of large-scale BF programmes during the timeframe of interest for our study. The Integrated Strategy for Attention to Nutrition (EsIAN, for its acronym in Spanish) was a pilot program within Prospera's conditional cash transfer program that aimed to strengthen the health and nutrition component by addressing the nutritional transition in Mexico and improving the health and nutrition of beneficiaries, with a strong focus on the first 1000 days (Hernández-Licona et al., 2019). The three components of the EsIAN strategy were: (i) nutrition supplementation for pregnant and lactating women (tablets with micronutrients) and children aged 6-59 months (micronutrient powders, fortified porridge and milk), (ii) improved health care systems (specifically, equipment and quality of nutrition counseling) and (iii) behavior change communication and training, designed to promote infant feeding practices according to international recommendations. Moreover, the National Breastfeeding Strategy, implemented between 2014 and 2018, was a national policy that integrated different actions to promote, protect and support BF. Its specific aim was to increase the prevalence of girls and boys who are breastfed from birth and up to 2 years of age. It is noteworthy that the policy included strong intersectoral coordination including the health care system, the workplace and the community sectors. In addition, the strategy directly focused on the need to strengthen the dissemination and monitoring of compliance of the Code.
Regarding the legal status of the Code, Mexico is moderately aligned (WHO, 2020a), but has no defined and Mexico's effort to improve infant feeding practices was initiated after the sharp decrease in BF practices shown by the National Health and Nutrition Survey in 2012 (Monitoring and evaluation) (Gutiérrez et al., 2012).
'…I believe that starting around the year two thousand fourteen, a process of visibility and awareness was initiated based on the data from the 2012 National Health and Nutrition Survey, which indicated a dramatic drop in breastfeeding practices in Mexico. I believe that the publication of this information and its appropriation by some scientific research institutes and civil society organizations as a fundamental element to publicly advocate in favor of breastfeeding detonated a series of movements that have, uh, advocated in favor of breastfeeding…' (Civil Society, Mexico [05M]).
'…One of the factors that I think that, uh, set off all the alarms was the Health and Nutrition Survey in 2012, where, well, it was reported that only 14.4% of the population was exclusively breastfeeding. So, I think that this evidence made everyone start to see, in one way or another, what activities could be done to promote, protect and support breastfeeding in different areas' (International Organization, This brought to the attention the urgent need to act in favor of improving BF practices in the country. International organizations, Civil Society, Academia and Government allies started to identify strategies and opportunities to improve BF practices, a process that was strongly advanced by the BBF initiative as it has allowed them to work in a coordinated manner. '… It may have been the aggregate of small actions that academia and civil society have been pushing together with international organizations. But, well, they were like little ant steps…' (Academia, Mexico [04M]).
'… the work of research institutes and international organizations such as those I mentioned, have been key in progressively modifying breastfeeding practices in Mexico…' (Civil Society, Mexico, [05M]).
'… But also, at the level of civil society, academia and United Nations agencies. Especially among us, if we join efforts to promote this practice in different sectors, right…' (International Organization, Mexico [01M]).
In the context of the sharp decline in BF practices in the country and evidence-based BF advocacy, BF made its way into the government's agenda. In 2014, the Secretary of Health in Mexico promoted the reform of the 'Ley General de Salud' (Health General Law), which stipulates the mandatory set of actions that contribute to increasing EBF and the duration of any type of BF including training of health professionals in the BF area. As a result of this amendment, the 2013-2018 National Development Plan included the need to promote BF through actions to increase the duration of BF, EBF through BF promotion programmes and BF training of health personnel. It is in this context that the National Breastfeeding Strategy (ENLM, for its acronym in Spanish) was launched by the Secretary of Health and was implemented from 2014 to 2018 as the national breastfeeding policy (Secretaría de Salud, 2013). The ENLM had important limitations, HERNÁNDEZ-CORDERO ET AL.
such as not having an assigned budget, the lack of clarity on the proposed indicators for its evaluation and the lack of an implementation and impact evaluation strategy based on a proper study design. Nevertheless, key informants considered that the Strategy did advance the cause of BF in Mexico because it included actions and guidelines for health services nationwide to engage in promoting, protecting and supporting BF.
'… Another important thing that happened during the last six years was the publication of the National Breastfeeding Strategy, which, although it was a strategy that did not have specific funding, was a strategy emanating from the National Breastfeeding Strategy. It was a strategy emanating from the Ministry of Health, with guidelines for all state health services, which established a line of actions to promote breastfeeding. I believe that this strategy, although it had some institutional weaknesses, did mark a milestone…' (Civil Society, Mexico [05M]).
'… The National Breastfeeding Strategy was implemented between 2014-2018, and although it did not have a budget, well, we consider that it is an integrating axis of actions in favor of breastfeeding that was coordinated by the Ministry of Health in this period…' (Academia, Mexico [02M]).
'…There was a breastfeeding strategy, that is, a national promotion of breastfeeding, right? This one, which had some indicators, uh, and which, presented several people to talk about it… certainly put the topic into the agenda…' (Academia, Mexico [04M]).
In the same vein, various initiatives for amending laws and regulations emerged; for instance, the development of 'Norm project 050' ('Proyecto de norma 050') in 2018. Even though it has not yet been ratified, this norm is important because it sets out more specific criteria on actions that need to be taken for strengthening the promotion, protection and support of BF up to the age of 2 years, and with a strong focus on EBF during the first 6 months of life. This standard was proposed to be mandatory at the national level for health service personnel in the public, social and private sectors of the National Health System who are involved with maternal and child health care services, as well as for all persons, companies, or institutions that have contact with mothers of infants and young children. BF women and those involved in the care, feeding and development of children (Diario Oficial de la Federación [DOF], 2018).
'…General Health Council issued provisions to strengthen public policies related to breastfeeding and breastmilk substitutes and issued a decree reforming the General Health Law on human milk banks. There was another decree reforming some laws to protect, approve, promote, and support breastfeeding. There was a project of Norm 050…' (Academia, Mexico [02M]).
'…I believe that the government also began to analyze some regulations, which although they have not yet been published, such as NOM 050, there was finally a willingness, right?…' (International Organization, Mexico [01M]).
In Mexico, social mobilization, wellcoordinated work among key actors and evidence-based advocacy represented a major step forward in the promotion, protection and support of BF. However, there are still major challenges to further improving BF practices in Mexico, especially due to the loss of political will as a result of the presidential transition (ie., the government that came to power in 2018 has abandoned many of the BF policies and programmes that likely contriuted to the doubling of EBF during the previous decade).
'…A breastfeeding strategy was renewed when the government changed and despite that, I know that entities such as Chihuahua specifically continued this one, implementing the breastfeeding strategy because that is what that entity decided, right? As they may also have their state strategies, but at the national level there is no longer any coordination, right? of a strategy that tries to unite the efforts of different areas at the federal level. There is also no longer, for example, the Interinstitutional Committee on Breastfeeding, which was led by the Gender Equity Commission. And although, I know that maybe they are going to take it up again, but once the government changed, all that effort was fragmented and it was not followed up adequately…' (Academia, Mexico [02M]).
'…I see a gigantic institutional fragility, right? That dragged from six years ago, right? As breastfeeding is left to the will of the administrator who arrives…' (Academia, Mexico [04M]).
'…Do you consider that in Mexico infant feeding practices, especially breastfeeding, are a priority in terms of developing policies, programs or interventions? No, absolutely not. I think absolutely not. In other words, I do not see any sector that is taking it as a priority in public policy…' (Academia, Mexico [04M]).
During the last decade, another important challenge identified was the lack of sufficient budget allocation to implement, monitor and evaluate strategies and initiatives to promote, protect and support BF, in accordance with the National Breastfeeding Strategy and other initiatives that were in place until recently.
'I think the main barrier is budgetary…This administration claims to be characterized by austerity, right? So administrative structures have been eliminated, programs have been eliminated and it is necessary to invest in breastfeeding, it is necessary to invest in training public servants, it is necessary to invest in expanding the baby-friendly hospital program. It is necessary to invest in monitoring, it is necessary to invest in social communication actions favorable to breastfeeding. It is necessary to invest in supervising that companies do not violate the Code. It is necessary to invest in accompanying mothers who are pregnant and in the first months of breastfeeding to help them solve the thousands of doubts and problems they will have so that they do not abandon breastfeeding. And…when you talk about investment or budget, even though it is a highly profitable investment, all doors are closed, right? Because all the resources are destined to policy priorities that have nothing to do with breastfeeding…' (Civil Society, Mexico [05M]).
Finally, marketing of BMS is a common practice in Mexico, and very prominent via different communication channels including social media, in the context of a lack of enforcement of the WHO Code.
'An abominable presence of the industry, no? which starts before getting pregnant. I believe, right? To make us believe that it is part of this formula normalization process' (Academia, Mexico [04M]).
'…intra-hospital practices that do not comply with the code and that also affect breastfeeding. Like still, there continues to be advertising or exposure of breastmilk substitutes in hospitals or immediate or once women leave the hospital. Doctors specifically are still one of the main actors, uh, recommending women to use infant formulas' (Academia, Mexico [01M]).
'Then there is also the exposure of advertising and marketing that now is also reaching us through, through digital means, through our phones, influencers, etcetera, that finally, well that, they make society believe that they don't have to know' (International Organization, Mexico [01M]).
'Another one has to do with all that is regulation,and changes to the regulatory framework to ensure compliance with the International Code of Marketing of Breastmilk Substitutes' (Academia, Mexico [02M]).

BOX 3 Philippines case study
The Philippines is a lower-middle-income country, located in the western Pacific Ocean, with a population of about 109,581,000 people in 2020, making it the twelfth most populated country in the world (The World Bank, 2020b). According to the 2019 Expanded National Nutrition Survey, exclusive breastfeeding (EBF) has an improvement from 52.3% in 2013 to 56.4% (Food and Nutrition Research Institute and Department of Science and Technology [FNRI-DOST], 2019). Over the past decade, in the Philippines, BF protection, promotion and support have been included in many national multicomponent policies (e.g., a sign of political commitment) and national development strategies. Through the literature review and supplemented with the key informant interviews, we were able to identify the most representative policies and programmes that have enabled the BF environment in the country.
Based on formative research that included direct delivery observations in 2008, clinical practice guidelines for essential newborn care were developed through the GRADE approach. These guidelines were adopted in the Department of Health (DOH) Administrative Order 2009-0025 with the objective of adopting new policies and the protocol 'Essential Intrapartum and Newborn Care' (EINC) (Sobel, Silvestre, et al., 2011). This protocol was key for institutionalizing a national package of cost-effective time-bound interventions, including immediate and thorough drying of the newborn; early and prolonged skin-to-skin contact (Moore et al., 2016); properly timed clamping and cutting of the cord after 1-3 min after birth, and nonseparation of the newborn from the mother for early BF initiation and roomingin. EINC became known as Early Essential Newborn Care (EENC) in the WHO Western Pacific Region in 2014 and is now commonly known as 'Unang Yakap' or The First Embrace in the Philippines. The implementation of this standard of care is ongoing in 8 additional countries (Cambodia, China, Lao PDR, Mongolia, Papua New Guinea, Philippines, Solomon Islands, Vanuatu, Viet Nam) in the region and is being regularly monitored.
'By 2010 and 2011, we had piloted the new practices, the sequence of drying skin to skin contact, delayed cord clamping and non-separation, we call it "don't separate." So, we call them the four core steps, the four core steps of immediate newborn care, number one: immediate and thorough drying, number two: skin to skin contact almost simultaneously, three: delayed cord clamping. And then four: nonseparation until completion of the first breastfeed. In a few years, we were able to scale up in the first pilot 11 hospitals…' (Civil Society, The Philippines [02P]).
'…The next law specifically states the rooming-in policy regarding all mothers that would be giving birth should be, should have their babies room in with them within 24 hours. So, we also make sure that all children born areable to [receive] breast milk by their moms within 24 hours. We measure these children and for now, we can see also that their their performance is increasing and that itis very, very much beneficial for the government and the public and the community…' (Government, The Philippines [03P]).
The maintenance of the aforementioned policy has been the result of advocacy by different actors to achieve institutionalization generated through the political will and the resources needed for implementation and continuous monitoring.  (Banerjee, 2017). They also invest in cultivating relationships with members, governments and all nutrition stakeholders to meet their objectives (Banerjee, 2017 Finally, the increase in the DOH's budget for child health services, including BF, is another clear example that BF is a priority for the Philippines government resulting from the advocacy-driven strong political will. This is also illustrated through the involvement in promotional activities, such as the creation of visual materials with the slogan 'Breastfeeding T. S. Ek' (Correct, Adequate and EBF).
'…Yes, yes, it's really a priority because I was telling you, it's part of the first 1000 days and even yeah, we know the benefit of it. Despite the strong legislation and the current monitoring system in the Philippines, there is aggressive and pervasive marketing of the BMS industry. In addition, there is a major challenge in legislation regarding the involvement of the BMS industry in high-level policy creating a conflict of interest; and the promotion of BMS on the internet and social media by influencers. One area of opportunity for the legislation is to strengthen advocacy in communities to counter aggressive BMS marketing. Similarly, an opportunity area of the official database for reporting violations of the Code could be to adopt the use of the platform so that it can be used by the entire population, regardless of their network access.
'…The politicians are using donations of food and milk, including milk to buy political leverage to buy, to buy popularity, etc. So, we're having to fight that. The expectation that the dole-outs during the pandemic should include formula, should include cereals, Gerber Cerelac, these are not necessarily products, etc.
[…] So, yes, even politics, even the issue of nutrition is being used for political gain, especially here in the pandemic and social, it's all tied together, social, political […] There are more poor than rich in the Philippines. So, if they can buy off the poor by donating these products to families, then they'll be elected to public office next year. So, it's very, very difficult. Nutrition is becoming a political weapon…' (Civil society, The Philippines [02P]).
'Oh, well, I would like to say that there is really a weak monitoring, weak monitoring, and reporting of the violations and even the actions, you know, the actions on the report, that violation. I think that that is really still really weak. There is no in-place monitoring platform.  2017). However, these estimates varied by race/ethnicity, mother's age and education, participation in WIC Programme (The Special Supplemental Nutrition Program for Women, Infants and Children), and family income. National estimates indicate substantial differences between non-Hispanic Black and non-Hispanic White infants across BF indicators in the United States. Three-quarters (76%) of Black infants are ever breastfed, which is below the national average of 84.1% (2017) (CDC, 2020). Although the great majority of infants started BF, only 58.3% of infants were breastfed at 6 months (CDC, 2020). For this reason, the United States has been actively implementing programmes and policies aimed at the protection, promotion and support of BF.
'…I think like, you know, like women who immigrate from other countries, particularly among like Latin America, it's more, it's culturally ingrained to breastfeed. So, to them, it's carrying a practice where they have a stronger support system. Whereas in the US, just given the history of how, like black Americans ended up here, you know, there is just not the same support. There's not the same community perception regarding breastfeeding. So, I think that there's just a lot of social factors that essentially tie back to historical trauma in the history of how we've treated certain people, groups in the country that, you know, impact like that have resulted in the decrease of breastfeeding rates as well…' (Government, USA [04U]).
The CDC's Division of Nutrition, Physical Activity and Obesity has been strongly committed to increasing BF rates through promoting and supporting optimal BF practices over the past decades. The CDC plays an essential role in the research and monitoring of infant feeding practices in the United States. The 'Breastfeeding Report Card' provides data on BF practices and supports in the country every two years. Furthermore, BF data from the NIS continue to be released annually. CDC has also been monitoring maternity practices, which has helped identify areas of opportunity to strengthen BF-related in-hospital practices, staff skills and discharge support. This is done through a biannual national hospital survey called Maternity Practices in Infant Nutrition and Care. The CDC then provides specific feedback to hospitals so they can implement evidence-based strategies to improve BF support. Additionally, CDC provides funding for interventions related to maternity care practices in the health sector to achieve the Baby-Friendly designation and at the community level through REACH (Racial and Ethnic Approaches to Community Health) grants.
'[…] CDC does a lot of tracking with breastfeeding rates. We release annual breastfeeding rates. That's something that has been critical to tracking the progress over the last ten years and seeing where we have continued to make progress and where areas maybe weren't progressing as quickly as we would like them to. But we also look at maternity care practices and document how those maternity care practices are changing over time. And hospitals have quite honestly used that data to go back to their administrators and talk about what are some of the things that we can do in our hospitals to improve the practices that we have to help support breastfeeding women […]' (Government, USA [05U]).
The United States has institutionalized programmes that have contributed for several decades to improving nutritional status and tackling food insecurity among the most vulnerable populations. The gradual decline in BF rates in the United States beginning in the early 20th century prompted the United States Congress to enact legislation to address malnutrition among low-income pregnant, lactating, or post-partum women and their infants and children. In 1966 the Child Nutrition Act was enacted, which in Section 17 includes the WIC Legislative Requirements. The WIC was established as a permanent program in 1974 to safeguard low-income pregnant, BF and non-BF post-partum women and children up to age five who are at nutritional risk (United States Department of Agriculture (USDA), 2013). It comprises four main components: nutrition education (promotion campaigns), BF support, healthy food packages and referrals to health and social services (USDA, 2013). The BF Peer Counselling Programme adds a critical dimension to WIC's efforts by providing a valuable service to their communities, addressing some of the most common BF barriers by offering BF education, support and role modeling (National WIC Association, 2019).
'… our breastfeeding peer counseling program is actually really good. It's been shown research shows that it's helped increase breastfeeding initiation rates within the program, particularly among black women who in the US historically have lower breastfeeding rates, they're less likely to breastfeed. So, I think that and due to the work of the National WIC Association, we've been able to get fully funded for the Breastfeeding Care Counseling Program. But I think ways in which we can expand that program within WIC will only further support breastfeeding mothers in the program. One of the best parts about that program is that breastfeeding peer counselors are women who usually have participated in WIC, they come from the same communities as the WIC participants, so they understand the culture, the language and so I think the great thing about that program, in particular, is that you are, you know, sometimes it can be intimidating when you're getting like just health care advice from a professional because it's like you may perceive them as being like above you. But with the breastfeeding peer counseling program, it's like you're talking to a peer, someone that's relatable, that understands you and knows how to support you, based on, like, your background…' (Government, USA [04U]).
Sustainability of programmes and initiatives as well as its monitoring are very strong in the United States, as evidenced by the Baby-Friendly Hospital Initiative (BFHI). Baby-Friendly USA, the national authority overseeing this programme, facilitates the health personnel training needed and provides technical assistance to hospitals in their pursuit of initial accreditation and subsequent reaccreditations. To achieve accreditation, hospitals must complete their '4D pathway' approach (Discovery, Development, Dissemination and Designation), which includes the staff training plan to integrate the 'Ten Steps to Successful Breastfeeding' into their maternity practices. Baby-Friendly (Continues) HERNÁNDEZ-CORDERO ET AL.
| 13 of 27 designation is conferred for a period of 5 years; the 3 years post designation is the Annual Quality Improvement Phase to assist facilities maintain compliance (sustainability), and the final 2 years is for Redesignation Phase.
'… Oh, yeah, let me just, I had ah, OK, let me just the pathway here, maybe. So, this is our process of accreditation, it's on our website. If you if you need, which I can share with you. But a new hospital will go through this 4-D pathway. And typically, there is approximately a year in each of the phases. So, each of the phases in the 4-D pathway usually take about a year. So, it takes about four years and then on-site assessment and designation. So, the facilities are required to submit materials to us throughout the 4-D pathway, and then prior to that designation, they submit a tremendous number of items to demonstrate their compliance with our guidelines and evaluation criteria. And so, when they become designated, which is typically four years, sometimes a little bit longer, then we redesignate every five years. And during that five-year period after initial designation to redesignation, there are three years for annual quality improvement and two years in the redesignation process. So, during all five years, there is accountability. They do they are required to submit quality improvement and monitoring data every year that they are in that redesignation phase. And then they, you know, they are up for reassessment every five years…' (Civil society, USA [01U]).
BF progress in the United States has been in part the result of well-coordinated collaborative work that includes key stakeholders in BF promotion and support. In May 2011, the Federal Interagency Breastfeeding workgroup was created with members who represent 16 individual agencies (Anstey et al., 2016). It includes the Department of Labor, Office of Women's Health, CDC, USDA, and National Institute of Health (NIH), among others. This workgroup provides a forum for information exchange across federal agencies and encourages collaborative approaches to address recommendations based on sound research conducted by the CDC and academia. The creation of this group helped to increase the capacity of the United States Breastfeeding Committee (USBC) and affiliated state coalitions. The USBC is an independent, nonprofit coalition of more than 100 influential professional, educational and governmental organizations, whose goal is to advance collaborative efforts to promote policies and practices that create an encouraging environment for BF across the country (advocacy). Unlike other countries, International Organizations are not visible in the United States, with the exception of the WHO with its participation through the BFHI.
'[…] we work across the agencies. So, there's even a federal interagency breastfeeding workgroup that has representatives across the board, everybody from the Department of Labor, Office of Women's Health, CDC, USDA, NIH. There's a whole range of groups that are involved and helping coordinate and collaborate so, we can talk within the federal government about the things that we're doing. Civil organizations like USBC or an organization like Thousand days tend to be doing more of the advocacy work.
[…] I haven't talked as much about academia, but they are a player in this as well and I think one of the things that they do very well is research […] We see less in the US with interactions with international organizations. That's not to say that they're not important. I think the World Health Organization is a huge, huge piece here and especially with the baby-friendly hospital initiative. So, they are a part of it. They just aren't as much of a part as maybe other countries. So, we haven't seen their role or maybe I haven't seen their role as much as some of the other organizations' (Government, United States [05]).
Although the United States has a strong program delivery and research and evaluation gear, some challenges were identified to improve the BF environment. Between 2016 and 2020 there were budget allocation for interventions that promote, protect and support BF due to major changes in government. Furthermore, the new political administration elected in 2020 is now giving evenmore priority and attention to public health issues, including BF.
The political support (political will) for BF in the country was recently crystalized in the 2020 Dietary Guidelines for Americans, the policy document upon which all federal food and nutrition policy is based, for the first time included recommendations for children under two that strongly endorsed BF. By contrast, BF protection in the United States is weak because for instance none of the WHO Code provisions has been ever adopted in the United States; therefore, the unchecked advertising of BMS is widespread and increasing in the country. Another major challenge is the lack of national laws for BF protection. While all 50 states, the District of Columbia, Puerto Rico and the Virgin Islands have laws that specifically allow women to breastfeed in any public or private locations, only 30 states, the District of Columbia and Puerto Rico have laws related to BF in the workplace. The Family and Medical Leave Act provides 12 weeks of unpaid leave to workers in companies with less than or equal to 50 employees. Currently, eight states (California, New Jersey, Rhode Island, New York, Washington state, Massachusetts, Connecticut and Oregon) and Washington DC have enacted laws offering paid family leave; however, it is partially paid for between 6 and 12 weeks, which is way less than the International Labour Organization (ILO) recommendation (ILO, 2000;NCSL, 2020).
' […] there are two major ones (challenges). The first one is the marketing of breastmilk substitutes by formula companies. They are very aggressive and somewhat insidious in their efforts to undermine breastfeeding. The international code of marketing of breastmilk substitutes was never signed by the United States and was never agreed to by the United States. And in the United States, there is a big issue with marketing by formula companies, and then I would say the second is really the lack of paid family leave. Many women return to work early after giving birth out of necessity or certainly fear of losing their jobs. So, the institution of paid family leave, a national paid family leave program would be, I think, would enhance breastfeeding in the United States.
'…So overall, yes, I think the US government and the United States are putting breastfeeding as a priority. At the federal level, one of the things that I think is really exciting is the most recent US dietary guidelines. The 2020 to 2025 included children birth to twenty-four months of age for the first time. And as part of that, they talked about exclusive breastfeeding for about the first six months. This is huge. This is the first time that we have had a comprehensive dietary guidance for children from birth to twenty-four months. It's also the first time that we had federal guidance on exclusive breastfeeding. All our other recommendations have come from the American Academy of Pediatrics. So, for this to come from a federal document that now all federal programmes need to adhere to is a huge step forward…' (Government, USA [05U]).
In regard to the United States, it is worth highlighting that the collaborative work through the Federal Interagency group has indeed impacted all RE-AIM dimensions.
T A B L E 3 Representative quotes from in-depth interviews based on the Breatsfeeding Gear Model (BFGM) a

Node (BFGM gear) Quotations
Advocacy '… that nutrition crisis that occurred in 2005 and there was a shift, there were and a big change in the country because the nutrition activities were strengthened and the government had decided to put a big importance in nutrition, international NGOs has come in the country and a lot of advocacy had started because at that moment there was not a direct specific directorate for nutrition at the Ministry of Health. Nutrition was handled by the Directorate of Family Health. So, in 2007, the following, the advocacy and the fact that nutrition was being strengthened and consolidated in the country, there was a creation of the Nutrition Directorate, which was there for nutrition activities. And this had a big shift also for to increase nutrition activities…' (International organization, Burkina Faso, [03B]).
'…And then I think in your question, you had also asked about international organizations. We see less in the US with interactions with international organizations. That's not to say that they're not important. I think the World Health Organization is a huge, huge piece here and especially with the baby friendly hospital initiative. So, they are a part of it. They just aren't as much of a part as maybe other countries. So, they have a, we haven't seen their role or maybe I haven't seen their role as much as some of the other organizations…' (Government, USA, [05U]).
'… International organizations are always advocating together with public agencies, such as UNICEF and PAHO, who have always been looking for the implementation of initiatives and legal changes for the protection of breastfeeding together, for example, with the National Institute of Public Health, which we have also been working with them hand in hand on that. The Universidad Iberoamericana. In this new government we have identified, for example, SIPINA, which is the "System for the Integral Protection of Children and Adolescents" that within the National Strategy for Early Childhood had incorporated the part of promoting breastfeeding and protection of the right to breastfeed…' (Academy, Mexico, [02M]).
Political will '…So, overall, yes, I think the US government and in the United States are putting breastfeeding as a priority. At the federal level, one of the things that I think is really exciting is the most recent US dietary guidelines. The 2020 to 2025 included children birth to twenty-four months of age for the first time. And as part of that they talked about exclusive breastfeeding for about the first six months. This is huge. This is the first time that we have had comprehensive dietary guidance for children birth to twenty-four months. It's also the first time that we had federal guidance on exclusive breastfeeding. All our other recommendations have come from the American Academy of Pediatrics. So, for this to come from a federal document that now all federal programs need to adhere to is a huge step forward. And I think we're going to continue to see the ramifications of that particular document for years to come…' (Government, USA, [05U]).
'… but it is also true that in terms of regulation, there is a specific interest on the part of Cofepris (Committee for Protection from Sanitary Risks) to make some modifications to the regulations, to the advertising guidelines, right? As I mentioned, right? The Code, the compliance with the Code, the monitoring of the Code, if there is, if they have expressed it, we have it in writing. However, maybe the events, the progress is a little bit slower than I would like to see, but maybe because that is the way it is and we have to be patient…' (International Organization, Mexico, [01M]).
Legislation and policies '…I told you early on that the Republic Act 11148, which is the First One Thousand Days Law, that's one. We have the very good Milk Code and the revised implementing rules and regulations. We also have the infant and young child feeding Strategic Plan which is being updated and we have now the updated version and we called it the IYCF 2020- '…So, there has been a consistent budget line for CDC to help promote and support breastfeeding in hospitals, and that has been an important piece for CDC to be able to continue to support the work for hospital level programs for state and community level programs…' (Government, USA, [05U]).
Training and program delivery '…Yes, actually, we have the RA 7600 and RA 10028, which is an expanded breastfeeding act, we have already included this provision that it should be part of the curriculum of our education sector. So breastfeeding and the other important things about breastfeeding are part of the curriculum from the grade school or the younger kids to the high school level to the college level. So, it's already been integrated. We have already partnered with the Ministry of Education, also the Ministry for Higher Education, and also it has been integrated in the curriculum of those in the special education like technical and education skills, which is not a four-year course, but only 2 year courses. It has also been included in those curricula…' (Government, The Philippines, [03P]).
'… and the other thing is that there are NGOs that are implementing the strategic plan of action on infant and young child feeding, mainly at community level. They are working in the area of community with the mother to mother support groups. And the specificity of Burkina Faso is that there are three groups of mothers, mother´s support groups. There is a group of pregnant women, a group of mothers that have children under six years, six months, six excuse me, and another group with the mother, lactating mothers with the children between six to 23 months. Ok? So what is good on this? Is that the content of the message is adapted to the specific group…' (International organization, Burkina Faso, [01B]).
Promotion '…So. Last year, we had, we started a campaign, a national campaign or initiative on stronger with breast milk only. It is a campaign, and we make an alliance with Alive and Thrive and UNICEF to support the government and later on, we had the support, a big support from the World Bank, a project, a bilateral project supporting the Ministry of Health. They put a lot of funding. We start these UNICEF and Alive and thrive and finally, when the support the government to develop a strategy and a plan of action budget and finally, what World bank came in and had funded that that big campaign. So, this is the big campaign that started last year that helped us to have actually to reach to have a good achievement…' (International organization, Burkina Faso, [01B]).
Research and evaluation '…CDC does a lot of tracking with breastfeeding rates. We release annual breastfeeding rates. That's something that has been critical to tracking the progress over the last ten years and seeing where we have continued to make progress and where areas maybe weren't progressing as quickly as we would like them to. But we also look at maternity care practices and document how those maternity care practices are changing over time.
And hospitals have quite honestly used that data to go back to their administrators and talk about what are some of the things that we can do in our hospitals to improve the practices that we have to help support breastfeeding women…' (Government, USA, [05U]).

Coordination, goals and monitoring
'…I feel that's another impetus, another factor that has helped our breastfeeding rates go up. Our Milk Code monitoring. We are trying our best to improve the monitoring of Milk Code violations. In fact, there was a project for a portal where mothers, anybody can report Milk Code violations. The portal worked fairly well. There were many, many reports…' (Civil Society, The Philippines, [02P]).
'…The other point is that the country has tried to work at different levels, a community labor, health system, and to do mass advocacy. To, to have only one message at all levels of implementation. And this has been really a success, a success story, I can say, for example, the government or the Ministry of Health will work with journalists, with the midwives, with them, with the NGOs, with the work health workers they are implementing at all 13 regions. They are not working only at the central level, but in the 13 regions to make sure that there is the same information that is going on all over the country, including the traditional leaders. So, this last year, the last five years, their country had really focused on traditional leaders because they have a very, how to say, a very big commodity. I don't know how to say the word influence. I can say every influence of the population…' (International organization, Burkina Faso, [01B]).
'…When we did our baseline study among the 481 deliveries in 51 hospitals, the skin to skin contact rate in that research-based study was only 8%. It was like maybe only one or two mothers who got skin to skin. But by the time we inserted skin to skin contact as a population survey indicator, it was up. I think till maybe 64% just by just by teaching health workers to, we like to  and income levels at the hospital and community levels (reach), the adoption and institutionalization of effective BF programmes including BFI and BF counseling (effectiveness and adoption) and sustainability in part because of stable budget allocations that have been successfully advocated for over time (maintenance) (Box 4).

| Similarities and differences among countries
To reach the objective of the study, Table 4 summarizes the lessons learned from the four-country case studies in different world regions.
Based on the BFGM gears, key enabling factors and challenges to achieve the scaling up of policies, programmes and interventions to protect, promote and support BF were identified. In all four countries, evidence-based advocacy, multisectoral political will, financing, research and evaluation, and coordination were key to fostering an enabling environment for BF. Furthermore, in all countries, major challenges were the lack of adequate maternity protection and the aggressive marketing of the breast-milk substitutes.

| DISCUSSION
The four-country comparative case study, successfully identified how countries from different regions were able to successfully scale up national BF policies and programmes that were likely to have contributed to improvements in BF practices in the past decade.
These findings are especially relevant because they happened in the context of powerful commercial, economic and social barriers that the majority of women in the world still face in exercising their right to breastfeed their for long as they want to. The implementation pathways that each country has followed to protect, promote and support BF were unique as predicted by the Complex Adaptive Systems Framework (Paina & Peters, 2012 In terms of findings that were common to all four countries, first, as the BFGM postulates, there is a need for more evidence-based advocacy to generate the political will necessary to develop and pass legislation that releases fiscal resources for adequate protection, promotion and support of BF. In all four countries, the involvement of different stakeholders, at all levels, Government, Civil Society, Academia, and International Organizations, played an important role in the development and approval of policies and programmes to empower more women to breastfeed.

Social mobilization and involvement of different stakeholders has been
identified by others as a key factor in the process of scaling-up action to improve nutrition (Gillespie et al., 2015). 11148, 11210 and 10028).
• Substantially aligned with the Code.
• Executive Order 51 (Philippine Milk Code) regulates the marketing and distribution of BMS.
• Official database for reinforcement of the Code.
• National Policy (includes breastfeeding promotion, protection and support): Early Essential Newborn Care (EENC).
• Child and Nutrition Act (1966) including WIC legislative requirements.
• • The volunteers of 'La Leche League' receive important training on breastfeeding issues, breastfeeding techniques and breastfeeding problem solving to accompany women in their process.
• Training of health personnel as part of the Specific Action Programme on Sexual and Reproductive Health (2020-2024).
• The Government and PAHO organize courses for breastfeeding instructors to carry out cascade training in the entities. • Topics related to breastfeeding were incorporated into the curriculum from the basic level of studies up to the university level.
• Training for health professionals based on the ENNC protocol to achieve standardized intrahospital practices. • WIC program targeting low-income families: Breastfeeding promotion and protection • Baby Friendly Hospital Initiative (BFHI).
• • Standardized nutrition and health messaging to ensure that the whole country receives the same information. • Monitoring of breastfeeding practices through different national surveys.
• Coordinated work between International Organizations and Academia to support breastfeeding policies in the workplace. • Monitoring of breastfeeding practices as well as policies and initiatives to promote, protect and support breastfeeding.
• Inclusion of skin-to-skin contact as an indicator in the National Demographic and Health Survey (NDHS).
• Monitoring system for reporting violations of the Code, called Mother-Baby Friendly Philippines.
• The Department of Health coordinates all activities and initiatives for breastfeeding promotion, protection and support.
• Monitoring of breastfeeding practices (Breastfeeding report cards) and Maternity care practices (Maternity Practices in Infant Nutrition Care).
• CDC Breastfeeding Report Card with state-by-state data to help public health practitioners work together to support breastfeeding.
• National Breastfeeding Committee coordinating initiatives and breastfeeding programmes, including different sectors (USDA, NIH and CDC).

Challenges
• Lack of local funding and specific resources for breastfeeding promotion, protection and support.
• Presence of the BMS industry through promotions to the general population and among health professionals, as well as interference in the legal process.
• Maternity leaves are not aligned with ILO recommendation No. 191.
• Limited budget allocation to implement, monitoring and evaluation of policies and programmes to protect, promote and support breastfeeding.
• BMS inappropriate marketing is common with no clear monitoring system nor effective and significant sanctions.
• Sustainability of policies and initiatives to promote, protect and support breastfeeding after a change of government.
• Gap in regulations to prevent politicians from using breast-milk substitutes products as a donation to buy popularity.
• Limited scope of the system for reporting violations of the Code, as the internet is required for its use.
• Budget allocation for interventions to promote, protect and support breastfeeding affected by government change.
• None of the Code provisions has ever been adopted by national legislation.
• No national paid maternity protection, including breastfeeding protection for working women. is indeed a major public health concern because it has been proven to encourage commercial milk formula consumption at the expense of BF.
Globally, it has been documented that mothers are heavily exposed to BMS promotion Hadihardjono et al., 2019;Hernández-Cordero et al., 2019) and that this exposure influences their infant decision Parry et al., 2013;Piwoz & Huffman, 2015;Sobel, Iellamo, et al., 2011). In addition, BMS marketing has become increasingly multifaceted and involves high-level political lobbying among other tacticts, thus requiring counteracting multi component and multilevel safeguards . The low or lack of financial resources was another common barrier reported in the studied countries. As with other maternalchild nutrition interventions, there is a need for adequate financial resources for scaling up protection, promotion and support of BF and implementing sound monitoring and evaluation systems to address both coverage and quality of implementation. The latter is crucial for improving decentralized decision-making and the overall governance of national programmes. From the RE-AIM framework perspective, financing used this way is key for maintaining or sustaining national BF policies and programmes. Finally, another important challenge, mentioned at least in two of the studied countries (Mexico and the United States), was the sustainability of policies and initiatives to protect, promote and support BF national programmes during government transitions. This is particularly important for policies that require long-term processes for impact, including those aimed to contribute to infant feeding practices (Escobar-Alegria et al., 2020).
Our study has some limitations. For Burkina Faso, it was not possible to reach two important stakeholders, government representatives and academia, in spite of repeated attempts to do so.
However, with the support and information provided by other stakeholders and with available literature we were able to comprehensibly efforts done in the country, although compared with the other three countries we may have missed some level of detail. The use of information technology communication platforms for interviews with stakeholders might have previously been considered a limitation of the study; however, in the context of the global COVID-19 pandemic, there is now ample evidence that sound qualitative research can be conducted at a distance using online information technology.
An innovative contribution and the main strength of this study was that we were able to systematically document key enabling factors for scaling up interventions, policies, or programmes to promote, protect and support BF using two complementary implementation sciences frameworks (Jilcott et al., 2007;Pérez-Escamilla et al., 2012). The RE-AIM framework (Jilcott et al., 2007)  In through this comparative case studies analysis to better understand the distinct and common approaches that the four countries examined put into place to protect, promote and support BF. It is likely that such strategies explain at least in part the EBF improvements in each country over the last decade. In all four countries, a major challenge remaining is the need to strongly regulate the marketing of BMS that continues to prevent or slow down progress in BF outcomes globally Hastings et al., 2020).

AUTHOR CONTRIBUTIONS
The authors' responsibilities were as follows: